According to the ahadith, this du’aa should be made while going to the masjid for Fajr salat. The darkness of the surroundings at that time reminds us of the general darkness of the human condition. Those who wake up and walk to the masjid at this time are true seekers of light. We seek it from Allah Ta’aala, as He is the only source of light. There is no light and there is no enlightenment without Him. “And he for whom Allah has not appointed light, for him there is no light” (An Nur, 24:40).